Drawing mechanism



Feb. 19, 1929.

A. C. BUTLER DRAWING HBCHANISII Filed May 7., 1926 Patented Feb. 19,1929.

UNITED STATES PATENT OFFIC DRAWING MECHANISM.

Application filed May 7, 1926, Serial No.

This invention relates to mechanisms for drawing rovings and the like,and is more particularly. concerned with the construction of a memberfor imparting a drawing resistance to the rovings as they pass throughthe mechanism. lVhile not restricted to such use, the drawing members ofthe present invention have been designed more particularly for use inconnection with drawing mechanisms such as are disclosed and claimed inmy Patent N 0. 1,586,605, granted June 1, 1926, fordrawing mechanisms,by which an unusually long draft between suc-' ccssive pairs of rollersmay be produced by the use of a drawing member acting on the roving andpositioned back of a roving feeding device in accordance with the lengthof the staple being drawn.

For a more complete understanding ofthis invention reference-may be hadto the accompanying drawings, in which Figure 1 is a somewhatdiagrammatic View of a single roller stand to which this invention maybe applied;

Figure 2 is a perspective view of one form drawing member;

Figure 3 is a side elevation of another form;

Figure 4: is adetail Figure 3; r

Figures 5, 6 and 7 are perspectives of other forms of drawing member;

F igures 8 Ll1(l 9 are detail plans showing the construction of Figure 5in different adjusted positions.

Referring to Figure 1, 1 indicates conventionally a roller standcarrying front and rear lowerdra-wing rollers 2 and 3, with whichcooperate upper front and rear rollers 4 and 5, which are supported inany suitable manner, as by the cap bar 6 pivotally mounted as at 7 onthe stand. Between the rollers 4 and 5, the cap bar has mounted thereon,preferably adjustablebetween these rollers i and 5, a bracket, member 8having its lower end slotted to form depending fingers 9, which mayextend on either side of a drawing member 10 with which this inventionis particularly concerned. If desired, this drawing member may beslidable between the fingers 9 and be given a traversing motion with theusual traverse bar 11 through connecting elements 12 and 13 and it isshown as positioned back of the forward section on line 4 4: of

passing between 107,427, and in Canada October 17, 1525.

rollers a distance substantially equal to or slightly less than thelength of the mass of the fibers being drawn so as to define a partingpoint for the fibers, as more particularly described in my patenthereinbefore mentioned.

The roving to be drawn passes between the rear rollers 5 and 3, whichconstitutes the rear roving feeding means and into drawing engagementwith the bar 10 before the front rollers 2 aud t, which constitutes theforward roving feeding means, and in order that this bar may imposedrafting resistance to the passage of the roving so as to define aparting point for the fibers, it is so made as to present an edge overwhich the roving passes, preferably this edge being formed by one orboth I sides of a suitable slot in the drawing member. In Figure 2, thedrawing member is shown as constructed of a bar 20 having a portion ofreduced height to form a relatively wide slot in its upper face definedby side walls 21 ateither end of the reduced portion. Each of thesewalls 21 forms one side of a roving receiving slot, the opposite wallbeing formed by the adjacent face 22 of a block 23, which is positionedwithin the reduced portion of the bar 20 and is shown as fixed in thisportion by means of a clamping cap 24 of channel'section e11- gagingover adjacent ends of the blocks 23 and held to the bar 20 in clampingrelation to the blocks 23 as by means of a screw 25, passing through thecap 24; and having threaded engagementat its lower end in the bar 20,this screw passing between the blocks loosening this screw, the blocks23 may be adjusted toward and from each other to determine the width ofthe roving receiv ing slots formed between their endwalls 22 and thewall portion 21 or" the bar 20 in accordance with the staple to bedrawn. order to prevent any of the fibers of the roving from entering inbetween the blocks 23 and the ,upper face of the reduced portion of thebar 20, guard means may be employed. While these means might be made invarious ways, as shown they are formed as extensions 26 from the loweredge of a side wall 27 of the cap 24, the upper edges of theseextensions being positioned above the engaging surfaces of the blocks 23and the bar 20 and extending across the lower ends of" the slots 22 soas to bridge over any cracks between the blocks and the bar into whichany of the fibers of the roving might find their way.

In Figures 3 and t another form of bar is shown, in which the width ofthe roving receiving slots is automatically adjustable, The bar as shownin these figures comprises portions 30 connected in spaced relation byportions 31 of reduced height, as shown, the spacing of the portions 30being adjustable by attaching the portions 31 thereto by screws 32passing through slots 33 in the member 31 and threaded into the members30. Pivoted to the member 31 between the members 30 at 3a are a pair ofdogs 35 having edge portions 36 positioned opposite to the ends 37 ofthe members 30 and defining there with slots 38 for reception of therovings shown at 39. The dogs 35 are so formed as to tend by theirweight to swing in directions to bring their edges 36 toward the edges37 of the bars 30, thus closing the slots Onto the rovings passingthercthrough.

In Figure 5 is shown a. still difi'erent form of member in which a bar40 has adjustably fixed thereto pairs of blocks ll, as by means of bolts42 threaded in the bar 450 and passing through elongated slots 43 in theblocks. These blocks have upper portions 45 partially severed from theirlower portions by slots 45, these upper portions being bent out of theplanes of the lower portions to form the vertical shoulders l? at theirends. These blocks may be positioned on the bar 40 in various relations,certain of these relations being shown in Figures 5, 8 and 9. The blocksmay be fixed on either side face of the bar 40 so that the edges 47 anda8 thereof may be positioned at different distances between the pair ofrollers of a drawing stand, as shown in Figure 1, without requiring anyadjustment of the bar 40 itself. For example, in Figure 5, the blocksare shown as fixed to the rear face of the bar 40 with their portions 45in substantially vertical alinement with the bar 40. In Figure 8, one ofthese blocks is shown as fixed to the forward face of the bar 40 withits edge port-ion a5 so turned as to project still further forwardlythereof, while in Figure 9 one block is shown as fixed to the forwardface of the bar at) with its edge 15 extended rearwardly so as to be insubstantially vertical alinement with the bar 40. These edges 45 mayserve as bearings for the rovings, as also may the edges 18. The blocksmay be positioned so that either the edges 43 are adjacent to each otherto define a slot therebetween or the edges i5 may define such a slot. Bythis means not only may the width of the slot be adjusted, but also theeffective positioning of the drawing edge of the drawing member may beadjusted length-' wise between the pairs of drawing rollers be.- tweenwhich the member is used, without requiring adjustment of the drawingmember as a whole.

In Figure 6 a still further modification is shown, in which the drawingmember comprises a bar 50 and a pair of blocks 51 which may be clampedthereto in various relations. As shown, each of the blocks 51 has adepending shank member 52 of substantially circular cross section, whichmay extend along either the forward or rearward vertical face of the bar50, while the upper portions 53 of the blocks may extend over the upperface of the bar 50 in any desired angular relation thereto. These blocksare shown as clamped to the bar 50 by means of a plate 54 havingvertically arranged grooves or channels 55 therein of greater width thanthe portions of the shanks f2 engaged thereby, so that these shanks maybe moved bodily along the bar 50 while remaining within the channels. The clamping membe 5a may be fixed to the bar 50 as by means of a screw'56 passing therethrough and threaded into a suitable opening in the bar50. Either the inn-er adjacent edges 57 or the remote edges 58 of theblocks 51 may be used as edges against which the rovings are drawn toeffect the drafting resistance to their passage.

in Figure 7 still another construction of drawing member is shown, inwhich an effective adjustment of the width of the roving receiving slotis produced withoru, however, actually requiring positive adjustment ofportions of the drawing member relative to each other. Referring tothis'figure, it will be seen that the bar 60 is provided with slots 61extending thereacross, these slots being out of right angularrelationship to the longitudinal axis of the bar 60. They are thus alsoout of alineinent with the general direction of the passage of theroving therethrough which is transverse to the length of the bar 60.Thus the roving engages on one side of the slot, as at 62, where itenters the slot and engages the opposite side, as at 63, where it leavesthe slot. which it engages these edges, and thus the resistance impartedthereby to the passage of the roving, is dependent on the size of theroving passing through the slot and also on the tension with which theroving is drawn, these being determined by the characteristics of theroving in accordance with which adjustments of the drawing portions arerequired, and thus the action of the drawing member of this constructionon the rovings automatically varies the action of the drawing memberthereon in the desired relation.

This member is thus effectively adjustable with relation to the rovingwithout requiring any actual relative movement of any of its parts. 7

Having thus described certain embodiments of this invention, it shouldbe evident to those skilled in the art that various The forcewithchanges and modifications might be made therein without departingfrom its spirit or scope as defined by the appended claims.

I claim: I

1. A drawing member comprising a bar having a portion of reduceddimensions to define a Wide slot, and members positioned within saidwide slot and defining with the side walls thereof a pair of narrowerroving receiving slots.

2. A drawing member comprising abar having a portion of reduceddimensions to define a wide slot, and members movable and positionedwithin said wide slot and defining with the side walls thereof a pair ofnarrower roving receiving slots each adjustable in width.

3. A drawing member comprising a bar having a reduced portion to definea wide slot, and a member positioned within the width of said slot anddefining with one wall thereof a narrower roving receiving slot.

4. A drawing member comprising a bar having a reduced portion defining-awide slot, a block seated in said wide slot portion, and means forclamping said block in said slot portion spaced from one wall thereof todefine a narrower roving receiving slot.

5. A drawing member comp-rising a bar having a reduced portion defininga wide slot, a block seated in said wide slot portion, and means forclamping said block in said slot portion spaced from one wall thereof todefine a narrower roving receiving slot, said drawing member comprisingan element bridging adjacent portions of said block and bar to preventthe entry of roving fibers therebetween. j

6. A drawing member comprising a bar having a reduced portion forming awide slot,

a pair of blocks seated in said slot, a cap engaging over saidblocks,and a clamping element extending from said cap to said barbetween said blocks and by which said blocks may be clamped beneath saidcap with their non-adjacent ends defining with opposite walls of saidwide slot narrower roving receiving slots.

7. A drawing member comprising a bar having a reduced portion forming awide slot, a pair of blocks seated in said slot, a cap engaging oversaid blocks, and a clamping element extending from said cap to said barbetween said blocks and by which said blocks may be clamped beneath saidcap with their non-adjacent ends defining with opposite walls of saidwide slot narrower roving receiving slots, said cap having extensionsbridging adjacent portions of said blocks and bar and the lower ends ofsaid roving receiving slots to prevent roving fibers from passingbetween said adjacent portions.

8. A drawing mechanism comprising forward and rear roving feeding means,and a drawing member having an adjustable rov ing engaging edge portionpositioned between said means and at such a distance from said forwardmeans as to define a parting point for the fibers.

9. A drawing mechanism comprising forward and rear roving feeding meansand a drawing member having a slot of adjustable width through which theroving passes, positioned back of said forward feeding means bysubstantially the length of the mass of the fibers being drawn.

In testimony whereof I have affixed my signature.

ARTHUR CECIL BUTLER.

